外文翻譯--燃?xì)鈭缶?全文預(yù)覽
【正文】 ecuting code from external program memory， PSEN is activated twice each machine cycle， except that two PSEN activations are skipped during each access to external data memory.EA/VPP External Access Enable. EA must be strapped to GND in order to enable the device to fetch code from external program memory locations starting at 0000H up to FFFFH. Note， however， that if lock bit 1 is programmed， EA will be internally latched on reset. EA should be strapped to VCC for internal program executions. This pin also receives the 12volt programming enable voltage (VPP) during Flash programming.XTAL1 Input to the inverting oscillator amplifier and input to the internal clock operating circuit.XTAL2 Output from the inverting oscillator amplifier.譯文：STC89C52 數(shù)據(jù)手冊功能特性描述STC89C52是一種低功耗、高性能CMOS8位微控制器，具有8K在系統(tǒng)可編程Flash 存儲器。 在日常生活中，無論是煤氣中毒還是煤氣爆炸事故，都因煤氣泄漏而起。福州大學(xué)至誠學(xué)院本科生畢業(yè)設(shè)計（論文）外文翻譯題 目： 基于單片機可燃?xì)怏w檢測報警器的設(shè)計 姓 名： 蔡佳陽 學(xué) 號： 211014128 系 別： 信息工程系 專 業(yè)： 電子信息工程 年 級： 2010級 指導(dǎo)教師： （簽名） 年 月 日附錄：外文文獻及譯文外文原文1 ： Combustible gas alarmCombustible gas alarmto prevent gas leakage as a powerful weapon, it has, however, does not seem to have attracted the attention it deserves. This security and household fire extinguishers can be placed on a par, or even more than the fire extinguisher into the family of the little things that most families do not see it as one thing, do not even know there can be such a fundamental solution to gas poisoning and gas explosion, the protection of God exists. Shanghai as an example, last year, due to poisoning and cooking gas water heater overflow out, piece of rubber hose off the aging caused by gas leakage and poisoning caused by a total of 86 deaths, accounting for all the gas data of accidents were 84%. However, according to an authoritative department to another survey released shows that in Shanghai, about three million gas users, the installation of domestic gas leakage alarm of less than 10%. In their daily lives, whether it is gas poisoning or gas explosion, becaus
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